Foundation for wind generating set

Abstract

The utility model discloses a foundation for a wind generating set, which comprises a circular bottom plate positioned at the bottom of a foundation pit. The side plates are fixed in the circumferential direction of the circular bottom plate and correspond to the side wall of the foundation pit; the multiple pile foundations are anchored in the soil body outside the foundation pit in an annular array mode; the top surfaces of the pile foundations and the top surfaces of the side plates correspond to the top surface of the foundation pit; the bearing platform is anchored on the top surfaces of the pile foundation and the side plates; a positioning groove for mounting a tower drum is formed in the top surface of the bearing platform; and the prestressing tendons are anchored on the bearing platform in a central radial shape. By optimizing the foundation structure and utilizing the side plates and the pile foundation to support the bearing platform, the use amount of foundation concrete and reinforcing steel bars is reduced, and the construction cost is saved; the bearing performance of the bearing platform is guaranteed through the prestressing tendons, the tower drum is positioned through the positioning grooves, and the mounting quality and precision of the tower drum are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, and more specifically to a foundation for wind turbine generator sets. Background Technology

[0002] With the continuous advancement of wind power generation technology, the single-unit capacity of wind turbine generators is increasing, and the foundations for these generators are also becoming larger, leading to higher construction costs. In related technologies, wind turbine foundations are typically variable-diameter discs made of reinforced concrete. The amount of steel reinforcement and concrete used is enormous. The increase in the single-unit capacity of wind turbine generators necessitates a corresponding increase in the amount of steel reinforcement and concrete, resulting in ever-increasing costs for wind turbine foundations.

[0003] Therefore, how to provide a wind turbine foundation with low cost and good anchoring performance is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present invention provides a foundation for wind turbine generator sets, aiming to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A foundation for a wind turbine generator includes:

[0007] A circular base plate, located at the bottom of the foundation pit;

[0008] Side plate, the side plate is fixed to the circumference of the circular base plate and corresponds to the side wall of the foundation pit;

[0009] The pile foundation consists of multiple piles arranged in a circular array and anchored in the soil outside the foundation pit; the top surface of the pile foundation corresponds to the top surface of the side plate of the foundation pit.

[0010] A pile cap, which is anchored to the top surface of the pile foundation and the side plate; the top surface of the pile cap is provided with a positioning groove for tower installation;

[0011] Prestressed tendons are anchored radially from the center onto the bearing platform.

[0012] The beneficial effects of this utility model are as follows: by using a circular base plate as the foundation pad, and utilizing the side plates and pile foundations to jointly support the foundation, the amount of concrete used at the bottom of the foundation is reduced; the positioning groove on the foundation facilitates the installation of the tower, ensuring installation quality and efficiency; the prestressed tendons increase the overall load-bearing capacity of the foundation, ensuring the overall temperature and strength of the wind turbine foundation; and the use of this foundation results in lower construction costs and better anchoring performance.

[0013] Preferably, multiple positioning plates are pre-embedded in the bottom wall of the positioning groove. These positioning plates are connected to the bottom end face of the tower, and the positioning groove ensures the installation position of the tower, thereby guaranteeing the installation quality of the wind turbine generator set.

[0014] Preferably, multiple settlement monitoring piles are pre-embedded on the top surface of the foundation. These piles are used to monitor whether foundation settlement has occurred and to assess the stability of the foundation.

[0015] Preferably, the side plate and the circular base plate together form a circular construction cavity, and the upper and lower ends of the support platform have through holes communicating with the construction cavity. Workers can enter the construction cavity to carry out foundation and unit installation.

[0016] Preferably, the outer wall of the foundation is an arc surface, and a hollow structural column is formed above the arc surface of the foundation, with the positioning groove formed on the top surface of the structural column. The arc surface reduces the amount of steel reinforcement and concrete used in the foundation, lowering construction costs, while prestressed tendons ensure the foundation's load-bearing capacity.

[0017] Preferably, the structural column is arranged corresponding to the construction cavity, and a tensioning gap is formed between the bottom surface of the structural column and the bottom wall of the corresponding construction cavity. This facilitates the tensioning of prestressed tendons.

[0018] Preferably, the prestressed tendon is positioned on the inner side of the structural column relative to the positioning groove.

[0019] Preferably, the inner wall of the structural column is fixed with multiple ladder-embedded plates, which can be bolted to ladders for access to the construction cavity. The ladders facilitate workers' access to the construction cavity.

[0020] Preferably, it also includes a hoisting platform, which is anchored to the outer wall of the pier. The hoisting platform facilitates the installation of the wind turbine generator set.

[0021] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a foundation for wind turbine generator sets. By optimizing the foundation structure, the foundation platform is supported by side plates and pile foundations, reducing the amount of foundation concrete and steel reinforcement, and saving construction costs. The bearing capacity of the platform is ensured by prestressed tendons, and the positioning groove is used for the positioning of the tower, ensuring the installation quality and accuracy of the tower. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1 The basic sectional view provided for this utility model;

[0024] Figure 2 The basic top view provided for this utility model.

[0025] in,

[0026] 1-Circular base plate; 11-Construction cavity; 2-Side plate; 3-Pile foundation; 4-Pile cap; 41-Positioning groove; 42-Positioning plate; 43-Arc surface; 44-Settlement observation pile; 5-Prestressed tendon; 6-Ladder embedded plate; 7-Lifting platform. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] This utility model discloses a foundation for a wind turbine generator set, which adopts a reinforced concrete structure and includes:

[0029] Circular base plate 1, located at the bottom of the foundation pit;

[0030] Side plate 2, which is fixed to the circumference of the circular base plate 1 and corresponds to the side wall of the foundation pit;

[0031] The pile foundation 3 consists of multiple piles arranged in a circular array and anchored in the soil outside the foundation pit; the top surface of the pile foundation 3 corresponds to the top surface of the side plate 2, which is the top surface of the foundation pit.

[0032] The pile cap 4 is anchored to the top surface of the pile foundation 3 and the side plate 2; the top surface of the pile cap 4 is provided with a positioning groove 41 for tower installation.

[0033] Prestressed tendons 5 are anchored radially from the center onto the foundation 4.

[0034] like Figure 1 and 2As shown, the foundation is arranged in a ring shape, with a circular base plate serving as the foundation pad. The side walls abut against the side walls of the foundation pit. Pile foundations are constructed outside the foundation pit, and the side plates and pile foundations support the pile cap, which reduces the amount of excavation in the foundation pit and the amount of steel reinforcement and concrete used in the supporting structure under the pile cap, thereby reducing construction costs. To ensure the load-bearing capacity of the pile cap, prestressed tendons are added for reinforcement, ensuring that the pile cap can effectively support the wind turbine tower. The positioning groove is used as a positioning measure for the tower, which can ensure the installation accuracy of the tower.

[0035] In this embodiment, multiple pile foundations are arranged in two rows radially from the center, with the number of pile foundations on the outer side being greater than that on the inner side. The pile cap is supported by the two rows of pile foundations and side plates, which reduces the settlement of the pile cap and ensures the overall stability of the wind turbine generator set after installation.

[0036] To further optimize the above technical solution and ensure effective docking of the tower bottom end within the positioning groove, multiple positioning plates 42 are pre-embedded in the bottom wall of the positioning groove 41. The positioning plates can be welded or bolted to the bottom end of the tower, and the number of positioning plates is no less than four, arranged radially from the center to ensure uniform stress at the tower docking point.

[0037] To further optimize the above technical solution and monitor the stability of the foundation, multiple settlement monitoring piles 44 are pre-embedded on the top surface of the foundation 4.

[0038] In this embodiment, the side plate 2 and the circular base plate 1 together form a circular construction cavity 11, and the upper and lower ends of the foundation 4 are provided with through holes communicating with the construction cavity 11. The foundation is similar to a hollow thin-walled pier structure, which reduces the amount of steel reinforcement and concrete used while ensuring that the foundation has sufficient bearing capacity.

[0039] To further optimize the above technical solution and reduce the amount of steel bars and concrete used in the foundation, the outer wall of the foundation 4 is an arc surface 43, and a hollow structural column is formed above the arc surface 43 of the foundation 4, with the positioning groove 41 opened on the top surface of the structural column.

[0040] like Figure 1 As shown, the foundation is similar to a hollow frustum structure. The side plates and pile foundations are at the same elevation. The connecting plate at the top of the side plates and pile foundations forms the lower base plate of the foundation. The structural columns form the upper caps of the foundation. There is a circular arc transition section between the structural columns and the lower base plate, which reduces the amount of steel reinforcement and concrete used in the foundation. The structural columns are arranged corresponding to the construction cavities, meaning they are located above the inner wall of the side plates and protrude from the corresponding construction cavities. The connection surface between the structural columns and the circular arc transition section is separated by the inner wall of the side plates, and the structural columns support the tower.

[0041] In this embodiment, the structural column is arranged in relation to the construction cavity 11, and a tension gap is formed between the bottom surface of the structural column and the bottom wall of the corresponding construction cavity 11.

[0042] The prestressed tendons are tensioned from both ends, thus optimizing the structure of the foundation. The space between the bottom of the structural column and the circular base plate serves as a tensioning gap. Pipe embedding holes are provided on the structural column, and prestressed ducts are embedded during concrete pouring, with the prestressed tendons passing through the ducts.

[0043] To further optimize the above technical solution, the prestressed tendons 5 are located inside the positioning groove 41 relative to the structural column. Since the positioning groove is used for tower positioning, the core stress area of ​​the structural column is located in the circular direction of the positioning groove. Therefore, the prestressed tendons inside the positioning groove provide the overall stress performance of the structural column. To ensure the structural column's support capacity for the tower, the prestressed tendons are arranged radially from the center at intervals, with no fewer than thirty tendons.

[0044] In some other specific embodiments, multiple ladder embedded plates 6 are fixed to the inner wall of the structural column. The ladder embedded plates 6 can be bolted to the ladders to allow workers to enter and exit the construction cavity 11. The ladder embedded plates connect to the construction ladders, making it convenient for workers to enter and exit the construction cavity.

[0045] In some other embodiments, a hoisting platform 7 is also included, which is anchored to the outer wall of the foundation 4. The hoisting platform is made of reinforced concrete and is cast on the arc surface of the foundation. This ensures the anchoring performance of the hoisting assembly and increases the support capacity of the hoisting platform. The hoisting platform can be used as a support platform for the hoisting legs, ensuring the safety of hoisting operations during the installation of the wind turbine generator set.

[0046] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0047] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A foundation for a wind turbine generator set, characterized in that, include: A circular base plate (1) is located at the bottom of the foundation pit; Side plate (2), the side plate (2) is fixed to the circumference of the circular base plate (1) and corresponds to the side wall of the pit; The pile foundation (3) consists of multiple piles arranged in a ring array and anchored in the soil outside the foundation pit; the top surface of the pile foundation (3) corresponds to the top surface of the side plate (2) and the top surface of the foundation pit. A pile cap (4) is anchored to the top surface of the pile foundation (3) and the side plate (2); a positioning groove (41) for tower installation is provided on the top surface of the pile cap (4); The prestressed tendons (5) are anchored radially from the center onto the pier (4).

2. The foundation for a wind turbine generator set according to claim 1, characterized in that, The bottom wall of the positioning groove (41) is pre-embedded with multiple positioning plates (42).

3. The foundation for a wind turbine generator set according to claim 1, characterized in that, Multiple settlement monitoring piles (44) are pre-embedded on the top surface of the foundation (4).

4. A foundation for a wind turbine generator set according to claim 1, characterized in that, The side plate (2) and the circular base plate (1) together form a circular construction cavity (11), and the upper and lower ends of the support platform (4) are provided with through holes that communicate with the construction cavity (11).

5. A foundation for a wind turbine generator set according to claim 4, characterized in that, The outer wall of the support platform (4) is an arc surface (43), and a hollow structural column is formed above the arc surface (43) of the support platform (4), and the positioning groove (41) is opened on the top surface of the structural column.

6. A foundation for a wind turbine generator set according to claim 5, characterized in that, The structural column is arranged corresponding to the construction cavity (11), and a tension gap is formed between the bottom surface of the structural column and the bottom wall of the corresponding construction cavity (11).

7. A foundation for a wind turbine generator set according to claim 5, characterized in that, The prestressed tendon (5) is positioned on the inner side of the structural column relative to the positioning groove (41).

8. A foundation for a wind turbine generator set according to claim 5, characterized in that, The inner wall of the structural column is fixed with multiple ladder embedded plates (6), and the ladder embedded plates (6) can be bolted to the ladder for entering the construction cavity (11) from above and below.

9. A foundation for a wind turbine generator set according to any one of claims 1 to 8, characterized in that, It also includes a hoisting platform (7), which is anchored to the outer wall of the pier (4).

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